I noticed recently that you do micro-transactions in many different forms of currency, however, when you play, you're only allowed to speak English.
Let's say someone from Japan decides to play, instantly goes to buy a donater pack and realizes speaking his/her own language in chat results in a ban or warning. It would upset the player and they'd demand a refund.
So my idea is fairly simple, forgive me for putting this at the bottom by the way, you see how on games such as Game of War, the chats on there have translation for people from other countries so people have a way to speak to each other. So that wouldn't be such a bad idea, right?
Side Note: This could also be a way of pulling in much more money from new players.